NO, NO, NO ..... ABSOLUTELY NO !!!!!
WD-40 isn't, wasn't, and never has been vegetable based ... nor has it EVER contained fish oil.
It's a petroleum based product of oil & solvents.
Even the WD-40 Company put out a disclaimer that the product was not recommended for use as a fish attractant. Check out this Snopes report, and notice that #39 Fish attractant was removed by the manufacturer as not a recommended use. The link also disclaims the "fish oil" idea, by showing the MSDS listed ingredients. snopes.com: Uses for WD-40 Spray Lubricant
PLEASE do not continue to contribute to the misinformation about WD-40 !! There is absolutely nothing in its contents that will attract fish.
... cp :kewl

